Folding Cart Side Frame with Inclined Rods for Structural Stability
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Solution Overview
Problem
Folding carts have poor structural strength and stability due to their foldable design, which limits their ability to meet user requirements for load-bearing capacity.
Innovation Solution
The design incorporates inclined rods between top and bottom rods, which are slidably connected to frames, enhancing the supporting strength between these components and improving folding stability by allowing the rods to rotate and slide during folding, thereby increasing overall structural strength and stability of the side frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If foldable structural design is used, then ease of carrying and storage is improved, but structural strength and stability deteriorate
Solution Approach 1:
The patent applies dynamics by making the side frame components movable rather than fixed. The front top rod and rear top rod are connected through a hinge mechanism that allows rotation, enabling the cart to transition between extended (high strength) and folded (portable) states. This dynamic connection resolves the contradiction by providing both ease of carrying and structural strength depending on the operational state.
Solution Approach 2:
The side frame is segmented into multiple independent components (front top rod, rear top rod, front bottom rod, rear bottom rod) connected by hinges. This segmentation allows each component to move independently during folding while maintaining overall structural integrity when extended, thus enabling both portability and strength.
2Adaptability or versatility
If foldable structural design is used, then ease of storage is improved, but load-bearing capacity deteriorate
Solution Approach 1:
The hinge connections between rods create a dynamic structure that can adapt its geometry. When stored, the structure folds compactly; when loaded, the rods extend and the hinge angles adjust to distribute forces effectively, maintaining load-bearing capacity despite the foldable design.
Solution Approach 2:
The patent combines multiple rods and hinge mechanisms into an integrated side frame assembly. This merging of components creates a unified structure where the rods work together to bear loads, with the hinges providing both mobility and force distribution, thus achieving both ease of storage and adequate load-bearing capacity.
3Strength
If multiple hinge connections are added to improve stability, then structural strength is improved, but device complexity increases
Solution Approach 1:
The side frame is divided into standardized rod segments connected by simple hinge joints. Each segment is relatively simple in design, and the repetition of these standardized components throughout the structure allows for improved stability through multiple connections without proportionally increasing overall complexity, as the same modular units are reused.
Data Source
AI summary
The present application provides a folding cart. Inclined rods are added between top rods and bottom rods, so that a supporting strength between the top rods and the bottom rods can be increased. The inclined rods are slidably connected to the bottom rods or a frame, so that stability of folding deformation is improved. According to the present application, an overall structural strength and folding stability of a side frame are improved, use requirements of users can be met to the greatest extent.